On Tue, Mar 21, 2017 at 09:13:52AM +0100, Thierry Reding wrote:
> From: Thierry Reding <treding@xxxxxxxxxx>
>
> Move the modeset locking from drivers into FB helpers.
>
> Tested-by: John Stultz <john.stultz@xxxxxxxxxx>
> Signed-off-by: Thierry Reding <treding@xxxxxxxxxx>
Reviewed-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
> ---
> drivers/gpu/drm/drm_fb_helper.c | 39 ++++++++++++++++++++++++++++------
> drivers/gpu/drm/i915/intel_dp_mst.c | 3 ---
> drivers/gpu/drm/radeon/radeon_dp_mst.c | 7 ------
> 3 files changed, 33 insertions(+), 16 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
> index 17fd98fe4a1f..6af80afc4f40 100644
> --- a/drivers/gpu/drm/drm_fb_helper.c
> +++ b/drivers/gpu/drm/drm_fb_helper.c
> @@ -109,8 +109,8 @@ static DEFINE_MUTEX(kernel_fb_helper_lock);
> for (({ lockdep_assert_held(&(fbh)->dev->mode_config.mutex); }), \
> i__ = 0; i__ < (fbh)->connector_count; i__++)
>
> -int drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper,
> - struct drm_connector *connector)
> +static int __drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper,
> + struct drm_connector *connector)
> {
> struct drm_fb_helper_connector **temp;
> struct drm_fb_helper_connector *conn;
> @@ -143,6 +143,20 @@ int drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper,
> fb_helper->connector_info[fb_helper->connector_count++] = conn;
> return 0;
> }
> +
> +int drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper,
> + struct drm_connector *connector)
> +{
> + int err;
> +
> + mutex_lock(&fb_helper->dev->mode_config.mutex);
> +
> + err = __drm_fb_helper_add_one_connector(fb_helper, connector);
> +
> + mutex_unlock(&fb_helper->dev->mode_config.mutex);
> +
> + return err;
> +}
> EXPORT_SYMBOL(drm_fb_helper_add_one_connector);
>
> /**
> @@ -172,8 +186,7 @@ int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper)
> mutex_lock(&dev->mode_config.mutex);
> drm_connector_list_iter_begin(dev, &conn_iter);
> drm_for_each_connector_iter(connector, &conn_iter) {
> - ret = drm_fb_helper_add_one_connector(fb_helper, connector);
> -
> + ret = __drm_fb_helper_add_one_connector(fb_helper, connector);
> if (ret)
> goto fail;
> }
> @@ -198,8 +211,8 @@ int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper)
> }
> EXPORT_SYMBOL(drm_fb_helper_single_add_all_connectors);
>
> -int drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper,
> - struct drm_connector *connector)
> +static int __drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper,
> + struct drm_connector *connector)
> {
> struct drm_fb_helper_connector *fb_helper_connector;
> int i, j;
> @@ -227,6 +240,20 @@ int drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper,
>
> return 0;
> }
> +
> +int drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper,
> + struct drm_connector *connector)
> +{
> + int err;
> +
> + mutex_lock(&fb_helper->dev->mode_config.mutex);
> +
> + err = __drm_fb_helper_remove_one_connector(fb_helper, connector);
> +
> + mutex_unlock(&fb_helper->dev->mode_config.mutex);
> +
> + return err;
> +}
> EXPORT_SYMBOL(drm_fb_helper_remove_one_connector);
>
> static void drm_fb_helper_save_lut_atomic(struct drm_crtc *crtc, struct drm_fb_helper *helper)
> diff --git a/drivers/gpu/drm/i915/intel_dp_mst.c b/drivers/gpu/drm/i915/intel_dp_mst.c
> index 094cbdcbcd6d..8336c5c6f45d 100644
> --- a/drivers/gpu/drm/i915/intel_dp_mst.c
> +++ b/drivers/gpu/drm/i915/intel_dp_mst.c
> @@ -484,15 +484,12 @@ static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
> struct drm_connector *connector)
> {
> struct intel_connector *intel_connector = to_intel_connector(connector);
> - struct drm_device *dev = connector->dev;
>
> drm_connector_unregister(connector);
>
> /* need to nuke the connector */
> - drm_modeset_lock_all(dev);
> intel_connector_remove_from_fbdev(intel_connector);
> intel_connector->mst_port = NULL;
> - drm_modeset_unlock_all(dev);
>
> drm_connector_unreference(&intel_connector->base);
> DRM_DEBUG_KMS("\n");
> diff --git a/drivers/gpu/drm/radeon/radeon_dp_mst.c b/drivers/gpu/drm/radeon/radeon_dp_mst.c
> index 7d5ada3980dc..b1855cf0ae7a 100644
> --- a/drivers/gpu/drm/radeon/radeon_dp_mst.c
> +++ b/drivers/gpu/drm/radeon/radeon_dp_mst.c
> @@ -300,9 +300,7 @@ static void radeon_dp_register_mst_connector(struct drm_connector *connector)
> struct drm_device *dev = connector->dev;
> struct radeon_device *rdev = dev->dev_private;
>
> - drm_modeset_lock_all(dev);
> radeon_fb_add_connector(rdev, connector);
> - drm_modeset_unlock_all(dev);
>
> drm_connector_register(connector);
> }
> @@ -315,13 +313,8 @@ static void radeon_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
> struct radeon_device *rdev = dev->dev_private;
>
> drm_connector_unregister(connector);
> - /* need to nuke the connector */
> - drm_modeset_lock_all(dev);
> - /* dpms off */
> radeon_fb_remove_connector(rdev, connector);
> -
> drm_connector_cleanup(connector);
> - drm_modeset_unlock_all(dev);
>
> kfree(connector);
> DRM_DEBUG_KMS("\n");
> --
> 2.12.0
>
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--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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